TYPES OF NUMBERS

TYPES OF NUMBERS

I. Natural Numbers : 

Counting numbers I, 2. 3, 4, 5, ..... are called natural Numbers .

2. Whole Numbers : 

All counting numbers together with zero form the set of whole number.

Thus,
(A) 0 is the only whole number which is not a natural number.
 
(B) Every natural number is a whole number

3. Integers : 

All natural numbers. 0 and negatives of counting numbers ie., - 3, - 2, - 1. 0.
I. 2, 3...... together form the set of integers

(A) Positive Integers t 11. 2. 3, 4, .....I is the set of all positive integers.

(B) Negative Integers : (- I, - 2, - 3......I is the set of all negative integers.

USES OF ELECTROMAGNETIC WAVES

USES OF ELECTROMAGNETIC WAVES

The following are some of the uses of electromagnetic waves

1. Radio waves are used in radio and T.V. communication systems.

2. Microwaves are used in microwave oven.

3. Infrared radiations are used

(a) in revealing the secret writings on the ancient walls

(b) in green houses to keep
the plants warm

(c) in warfare, for looking through haze, fog
or mist as these radiations can pass through them.

4. Ultraviolet radiations are used in the detection of invisible writing, forged documents, finger prints in forensic
laboratory and to preserve the food stuffs.

5. The study of infrared, visible and ultraviolet radiations help us to know through spectra, the structure of the molecules and arrangement of electrons in the external shells.

How Lonely you are ???

HOW LONELY YOU ARE A YALE UNIVERSITY STUDY FOUND THAT PEOPLE WHO TAKE LONGER SHOWERS AND BATHS ARE MORE LIKELY TO FEEL LONELY AND ISOLATED RESEARCHERS BELIEVE THEY SUBCONSCIOUSLY USE HOT BATHS AND SHOWERS AS A SUBSTITUTE FOR EMOTIONAL WARMTH......

Read here... what ANNA HAZARE said on 500 & 1000 Rs. Note BAN...

Anti corruption activist Anna Hazare believes Prime Minister Narendra Modi's decision on Tuesday night to wipe out black money by scrapping the currency note of Rs 500 and Rs 1000 was a revolutionary step and could lead to the begining of a "new India marching towards a corruption free society "

Meet The Man Behind PM Modi's Decision To Demonetize Rs.1000 And Rs.500 Notes

The sudden announcement of the demonetization of Rs.500 and Rs.1000 currency notes by Prime Minister Narender Modi has caused an uproar all over the country. The idea of this drastic change came from Anil Bokil of Arthkranti, a Pune based financial think tank.

ANIL BOKIL 

Bokil reportedly met PM Modi a few months back to give a presentation on financial reforms and was given a mere 9 minutes to put forward his take on the issue. He suggested some key measures to control the flow of black money, the main one being a ban on big currency notes. Apparently, his arguments were quite intriguing to PM Modi and he kept discussing the matter for almost two hours. 

The main suggestions by Bokil were :

1. The collection of money under 56 different taxes should be stopped except for import duty.